Sewing machine attachment



Sept. 1, 1936.

F. HUBBARD SEWING MACHINE ATTACHMENT -2 Shets-Sh'eet 1 Filed March 19,1956 I and fi Attorneys W F. HUBBARD SEWING MACHINE ATTACHMENT Sept. 1,1936.

2 Sheets-Sheet 2 Filed March 19, l936 EREEEEEEEEIFG Inventor ,4jwamaaard b 2% j and g A ttomeyg Patented Sept. 1, 1936 lTED STATESPATENT OFFICE The present invention relates to new and usefulimprovements in sewing machines for use particularly in the manufactureof knitted undergarments, such as mens union suits, and has for itsprimary object to provide, in a manner as hereinafter set forth, amachine of this character embodying a novel construction, combinationand arrangement of parts through the medium of which the tubular garmentmay be cut and the facing and the button stay sewed thereon all in oneoperation.

Further objects of the invention are to provide a sewing machine of thecharacter described which will be comparatively simple in construction,strong, durable, highly efficient and desirable in use, compact, lightin weight and which may be manufactured at low cost.

All of the foregoing and still further objects and advantages of theinvention will become apparent from a study of the followingspecification, taken in connection with the accompanying drawingswherein like characters of reference designate corresponding partsthroughout the several views, and wherein:

Figure 1 is a view in side elevation of an embodiment of the invention.

Figure 2 is a view principally in horizontal section through the bed.

Figure 3 is a vertical longitudinal sectional view taken substantiallyon the line 3-3 of Figure 2.

Figure 4 is a fragmentary View in vertical longitudinal section throughan outer end portion of the bed, showing the drive for the lower rollersand the lower knife.

Figure 5 is a vertical sectional view taken substantially on the line5-5 of Figure 1.

Referring now to the drawings in detail, it will be seen that theembodiment of the invention which has been illustrated comprises ahollow metallic base I, said base constituting a casing in which a maindrive shaft 2 is journalled. The base I is secured in any suitablemanner on one end portion of a suitable support 3, such as a table.Mounted on the base I is an arm 4 in the free end portion of whichneedle bars 5 are mounted for vertical reciprocation. The needle bars 5are operatively connected to the shaft 2 for actuation thereby in anysuitable manner. The reference numeral 6 designates the needles in thelower ends of the bars 5. It may be well to here state that this machinecomprises four needles 6.

Projecting horizontally from the base I beneath the arm 4 is acomparatively broad, fiat bed 1 of hollow construction. Journalledtransversely in the outer end portion of the bed 1 is a shaft 8 havingfixed thereon spaced feed rollers 9 and I 0. Also fixed on the shaft 8,between the rollers 9 and I0, is a roller II. On its 5 outer end, thecomparatively short feed roller 9 is provided with ratchet teeth l2.Pivotally mounted, at an intermediate point, on the adjacent side wallof the bed 1 is a lever I3 the upper end of which is connected by a rodM to 10 an eccentric l5 on the shaft 2. The other end portion of thelever I3 has formed therein a slot [6 in which one end of a rod I! ispivotally and adjustably connected. The other end of the rod I! isprovided with a suitable pawl l8 which is 15 operatively engaged withthe ratchet teeth [2. Still referring to Figure 2 of the drawings, thereference numerals l9 designate the feed arms of the machine, thereference numeral 20 designates the right and left looper shafts and 2|des- 20 ignates the right and left feed lift arms, all of these elementsbeing actuated by the main drive shaft 2.

Secured, as at 22, on the free end of the arm 4 is a metallic housing 23which includes a re- 25 movable front plate 24. Slidably mounted in thelower portion of the housing 23 is a block 25 on the lower end of whicha roller 26 is journalled,

a block 27 on the lower end of which a comparatively long roller 28 isjournalled and a block 30 29 on the lower end of which a knife 30 isjournalled. The roller 26 coacts with the lower roller 9, the roller 28coacts with the lower roller l0, and the knife 30 coacts with the rollerll. Springs 3| are provided in the housing 23 above 35 the blocks 25, 21and 29 for yieldingly urging the rollers 26 and 28 and the knife 30downwardly. The tension of the springs 3| may be regulated as desiredthrough the medium of adjusting screws 32 which are threadedly mountedin the 40 upper portion of the housing 23.

It is believed that the operation of the invention will be readilyunderstood from a consideration of the foregoing, particularly by thoseskilled in the art to which the invention pertains. The tubular garmentis fed by the coacting rollers 9 and 26 and Ill and 28 toward theneedles 6, said garment being cut or split longitudinally by thecoacting knife 30 and roller II. By reason of the pawl and ratchet driveshown to advantage 0 in Figures 3 and 4 of the drawings, the rollers 9,l0 and II will be intermittently actuated, thus moving the work in astep by step fashion. This step by step movement of the work issynchronized with the vertically reciprocating needles 55 6. Byadjusting the rod I! in the slot I6 of the lever l3 the stroke of saidrod and consequently the length of each movement of the work may beregulated as desired. Suitable folders for the facing lining, the buttonstay lining and for turning the edges of the garment are to be providedon the bed I between the feed rollers and the needles.

It is believed that the many advantages of a sewing machine constructedin accordance with the present invention will be readily understood, andalthough a preferred embodiment of the machine is as illustrated anddescribed, it is to be understood that changes in the details ofconstruction and in the combination and arrange ment of parts may beresorted to which will fall within the scope of the invention asclaimed.

Having thus described the invention, what is claimed as new is:

A cutting attachment for sewing machines comprising, a shaft journalledin the bed of the machine, spaced feed rollers fixed on said shaft, anintermediate roller fixed on said shaft between said feed rollers, meansfor intermittently actuating the shaft, 2. housing mounted on themachine above said rollers, blocks mounted for vertical sliding movementin said housing, rollers journalled on certain of the blocks andcooperable with the first namedrollers, a circular knife journalled onthe other of said blocks and cooperable with the second named roller,springs for yieldingly urging the third named rollers and the. knifetoward the first and intermediate rollsprings.

, ers, and means for regulating the tension of said 15

